Earlier this year, Pizza Hut received a lot of buzz when it announced it was hiring for a “Twintern” – a summer intern that would be responsible for maintaining the company’s presence on Twitter and other social media sites.

This week, the selected Twintern, Alexis Robinson, reported to work, and her first move is to offer up a promo of KFC proportions: free food for everyone that follows the company on Twitter or becomes a fan on Facebook.

KFC, which like Pizza Hut is owned by YUM Brands, somewhat infamously offered free meals earlier this year through a promotion on Oprah. Perhaps having learned some lessons from that campaign, Pizza Hut’s program comes with a few caveats as the company attempts to grow its social media presence.

The first caveat is that you’ll need to either be following Pizza Hut on either Twitter or Facebook. Nearly a million people already do so on the latter (and each update attracts hundreds of comments), but as of now, the company has a relatively small Twitter following with just over 4,000 people tuning in to updates from the chain.

Next, if you want a free order of Stuffed Pizza Rolls, you’ll have to take time out of Independence Day to check in on either of the two social sites, because the company won’t be announcing how to actually claim your free food until then. Further, the special code they announce will only be redeemable on July 4th. Finally, it’s not completely free – you’ll need to buy a large pizza at menu price.

These terms and conditions are likely to make the campaign far less of a mob scene than the KFC promotion, which was more or less a no strings attached meal voucher and good for a number of days. Nonetheless, it should be a good way for Pizza Hut to capitalize on some of the hype already generated by their Twintern program, and expand their social media following without breaking the bank.